Craig Hallstrom, President of NSTAR, said significant progress was being made but the company was advising customers who were still without power to be prepared for a multi-day restoration effort and to plan accordingly.

“We are focused on restoring power quickly and safely to as many customers as possible,” Hallstrom said. “We expect to make good progress today, but this will be a multi-day effort, due to the tremendous damage the blizzard caused and the challenge of negotiating roadways to access the electrical system.”

The South Shore, Cape Cod and the Southcoast were the areas hardest hit by the blizzard and are where utility company’s restoration efforts are focused.

The utility said more than 2,000 crews were dedicated to restoring power in communities, including supplemental crews from 26 states and two Canadian provinces.

National Grid expects power restoration to extend into earlier in the week, the company said in a release Saturday night.

Lawyers for Boston Marathon bomber Dzkokhar Tsarnaev rested their case in his federal death penalty trial Tuesday after presenting a brief case aimed at showing his late older brother was the mastermind of the 2013 terror attack.